none of the gauges are connected to the computer. When I yanked the TPI off my car I unplugged the massive amounts of wires going into the computer, followed each one and cut it. Just make note of where all the sensors for the gauges are and dont cut those wires ...easy as 1 2 3
the ignition I believe has 3-4 wires going into the computer controlled distributors ...when using a mechanical HEI you need 2. Get out a diagram and find which wire powers the ignition, hook it up to "BATT", find the wire that goes to the tach and hook it up to "TACH" ...easy easy easy
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